Specimens described as Ophioglossum pedunculosum Desvaux in FRPS (2: 9-10. 1959) and some provincial floras (e.g., floras of Anhui, Fujian, Guangdong, Guizhou, Jiangxi, and Yunnan) should be included in O. petiolatum. According to the studies by Clausen (Mem. Torrey Bot. Club 19(2): 1-177. 1938), O. pedunculosum was described as having a lamina with a prominent pale median band, but this character is very different in Chinese specimens. Whether O. pedunculosum is really distributed in China needs further study. Chinnock (Fl. Australia Online: http://www.anbg.gov.au/abrs/online-resources/flora; accessed 18 Jul 2012) includes O. petiolatum within O. reticulatum.